Usage and Installation of the Function qs() for R

The function qs() performs exact conditional goodness of fit tests for quasi-symmetry in square contingency tables as described by Booth Capanu and Heigenhauser (2003): 'Exact conditional p-value calculation for the quasi-symmetry model'.

This page provides all necessary information to run qs() on Unix systems. Users of any other OS can find directions for running C-code from R in chapter 4 of the 'Writing R Extensions' manual that can be downloaded from Cran at  http://cran.us.r-project.org/doc/manuals/R-exts.pdf .
 
 

Installation

• Download qs.r and qs.c to your computer, e.g. to the directory /home/usr/ .
• Create a shared library qs.so in this directory with the command:

R CMD SHLIB -o /home/usr/qs.so /home/usr/qs.c .
• Start R and source qs.r with the command:

source("/home/usr/qs.r") .
• Dynamically load the previous created library with the command:

dyn.load("/home/usr/qs.so") .

Usage

• A help file is available in the pdf-format: qshelp.pdf.
• The file example.r shows how to do the computations for two examples used in the article by Booth, Capanu and Heigenhauser.